FR2837281A1 - SEMICONDUCTOR SENSOR WITH INTEGRATED ADJUSTMENT CIRCUIT AND TORSION BAR TYPE TORQUE SENSOR SYSTEM - Google Patents
SEMICONDUCTOR SENSOR WITH INTEGRATED ADJUSTMENT CIRCUIT AND TORSION BAR TYPE TORQUE SENSOR SYSTEM Download PDFInfo
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- FR2837281A1 FR2837281A1 FR0301728A FR0301728A FR2837281A1 FR 2837281 A1 FR2837281 A1 FR 2837281A1 FR 0301728 A FR0301728 A FR 0301728A FR 0301728 A FR0301728 A FR 0301728A FR 2837281 A1 FR2837281 A1 FR 2837281A1
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- volatile memory
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- magnetic
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
- G01L5/221—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to steering wheels, e.g. for power assisted steering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
- B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
- B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/104—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving permanent magnets
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Power Steering Mechanism (AREA)
- Hall/Mr Elements (AREA)
Abstract
Un système de capteur de couple de type à barre de torsion (1) est prévu avec les éléments suivants : un élément élastique (4) qui reçoit un couple et convertit le couple en un déplacement de la torsion; un aimant annulaire à plusieurs pôles (5) dans lequel les pôles N et les pôles S sont magnétisés sur la circonférence et alternativement; une paire de demi-couronnes magnétiques (6A et 6B) placées de manière coaxiale avec l'aimant annulaire (5); et un capteur magnétométrique (7) qui détecte un flux magnétique généré entre la paire de demi-couronnes magnétiques (6A et 6B). Le capteur magnétométrique (7) est constitué d'un semi-conducteur qui intègre un capteur à semi-conducteur magnétométrique (70), une mémoire non volatile (7N), un circuit de calcul (71) et un circuit de sortie (7K). Cette structure fournit un système de capteur de couple (1) dont la maintenabilité est excellent.A torsion bar type torque sensor system (1) is provided with the following elements: an elastic element (4) which receives a torque and converts the torque into a displacement of the torsion; a multi-pole annular magnet (5) in which the N poles and the S poles are magnetized on the circumference and alternately; a pair of magnetic half-rings (6A and 6B) placed coaxially with the annular magnet (5); and a magnetometric sensor (7) which detects a magnetic flux generated between the pair of magnetic half-rings (6A and 6B). The magnetometric sensor (7) consists of a semiconductor which integrates a magnetometric semiconductor sensor (70), a non-volatile memory (7N), a calculation circuit (71) and an output circuit (7K). . This structure provides a torque sensor system (1) whose maintainability is excellent.
Description
ceinLure (9). CAPTEUR A SEMT-CONDUCTEUR A ClRCUlT DE REGLAGE INTEGREbelt (9). SEMICONDUCTOR SENSOR WITH INTEGRATED ADJUSTMENT CLRCUlT
ET SYSTEME DE CAPTEUR DE COUPLE DE TYPE A BARRE DE TORSION TORQUE BAR TYPE TORQUE SENSOR SYSTEM AND SYSTEM
La presente invention concerne un capteur a semi- The present invention relates to a semi-sensor
conducteur a circuit de reglage integre et un systeme de capteur de couple de type a barre de torsion qui utilise le conductor with integrated control circuit and a torsion bar type torque sensor system which uses the
capteur a semi-conducteur a circuit de reglage integre. semiconductor sensor with integrated control circuit.
Un systeme de capteur de couple de type a barre de torsion traditionnel utilise un aimant permanent comme generateur de flux magnetique, de sorte que la variation de la densite de flux magnetique residue! due a la variation de la temperature affecte la sensibilite d'un capteur de couple. Un ecart de taille, de type et de caracteristiques du materiau de l'aimant permanent provoque une fluctuation de la sensibilite et une valeur de decalage (sortie de A traditional torsion bar type torque sensor system uses a permanent magnet as a magnetic flux generator, so that the variation in magnetic flux density remains! due to the change in temperature affects the sensitivity of a torque sensor. A difference in size, type and characteristics of the permanent magnet material causes a fluctuation in sensitivity and an offset value (output of
point zero) de la sonde de couple.point zero) of the torque probe.
Le systeme de capteur de couple de type a barre de torsion traditionnel est done equipe d'un capteur de temperature tel qu'une thermistance placee autour de l'aimant permanent. En fonction de la temperature detectee par le capteur de temperature, la fluctuation est reglee The traditional torsion bar type torque sensor system is therefore fitted with a temperature sensor such as a thermistor placed around the permanent magnet. Depending on the temperature detected by the temperature sensor, the fluctuation is adjusted
dans un circuit a l'exterieur du capteur. in a circuit outside the sensor.
Toutefois, le procede decrit ci-dessus, appele procede de reglage externe, implique l' installation d'un circuit de reglage externe separe pour le reglage ou l'agrandissement d'une section de commande du systeme de capteur de couple lorsque le circuit de reglage est ajoute a la section de commande du systeme de capteur de couple. Ceci a pour consequence une augmentation de la taille et du cout du systeme de capteur de couple. De plus, le remplacement de la partie capteur, a la suite d'une panne, invalide les donnees de reglage precedentes dans le circuit de reglage decrit ci-dessus. Ceci implique done le remplacement de la totalite du systeme de capteur de couple comprenant le circuit de reglage externe, ce qui augmente les couts de maintenance. Le probleme presente ci-dessus survient non seulement dans le systeme de capteur de couple de type a barre de torsion, mais aussi dans un systeme de capteur habitue!. Un but de la presente invention consiste a fournir un capteur a semi-conducteur a circuit de reglage integre et un systeme de capteur de couple de type a barre de torsion qui utilise le capteur a semi-conducteur a circuit de However, the method described above, called the external adjustment method, involves the installation of a separate external adjustment circuit for the adjustment or enlargement of a control section of the torque sensor system when the adjustment is added to the control section of the torque transducer system. This results in an increase in the size and cost of the torque sensor system. In addition, the replacement of the sensor part, following a failure, invalidates the previous adjustment data in the adjustment circuit described above. This therefore involves replacing the entire torque sensor system including the external adjustment circuit, which increases maintenance costs. The above problem occurs not only in the torsion bar type torque sensor system, but also in a familiar sensor system !. An object of the present invention is to provide a semiconductor sensor with integrated control circuit and a torsion bar type torque sensor system which uses the semiconductor sensor with a control circuit.
reglage integre.integrated adjustment.
Afin d'atteindre les buts ci-dessus et autres buts, un capteur a semiconducteur a reglage de sortie integre est prevu avec une pluralite de sections qui vent integrees dans le capteur. Ici, une section de detection detecte au moins une parmi une quantite physique et une quantite chimique en tent que quantite electrique. Une section de detection thermique detecte la temperature. Une section de memoire non- volatile reinscriptible stocke de maniere reinscriptible des donnees de reglage pour regler une erreur relative a la quantite electrique detectee. Une section de calcul du reglage delivre en sortie un signal regle apres le reglage du decalage de la quantite electrique detectee, le reglage de la sensibilite et le reglage de la temperature, en fonction de la temperature In order to achieve the above and other purposes, a semiconductor sensor with integrated output adjustment is provided with a plurality of sections which are integrated into the sensor. Here, a detection section detects at least one of a physical quantity and a chemical quantity as an electric quantity. A thermal detection section detects the temperature. A rewritable non-volatile memory section stores rewritable setting data to resolve an error relating to the detected electrical quantity. A section for calculating the adjustment delivers a regulated signal as output after the adjustment of the offset of the detected electric quantity, the adjustment of the sensitivity and the adjustment of the temperature, as a function of the temperature
detectee et des donnees de reglage stockees. detected and stored setting data.
C'est-a-dire que le detecteur a semi-conducteur est constitue d'un circuit integre monolithique constitue d'une seule puce comprenant les sections decrites ci-dessus, de sorte qu'il effectue de maniere interne le reglage du decalage, le reglage de la sensibilite et le reglage de la temperature. Une panne au niveau du capteur implique done seulement le remplacement du capteur meme, mais pas de remplacement, ni de reglage supplementaire du circuit externe, ce qui simplifie la maintenance du systeme de capteur. Il est preferable que le detecteur a semi-conducteur comprenne de plus une section de commande de fonctionnement pour recevoir de maniere externe une commande de fonctionnement et des donnees de reglage ulterieures. Ici, la section de commande de fonctionnement ecrit les donnees de reglage ulterieures dans la memoire non-volatile reinscriptible lorsque la commande de fonctionnement est une commande d'ecriture. Ceci facilite l'ecriture des donnees de reglage dans la memoire non-volatile reinscriptible. Il est egalement preferable que la commande du fonctionnement soit une commande d/interdiction d'ecriture, la section de commande du fonctionnement interdit l'ecriture des donnees de reglage ulterieures dans la memoire non-volatile reinscriptible. Ceci empeche que du bruit ou d'autres evenements anormaux reecrivent des donnees de reglage erronees dans la memoire non-volatile reinscriptible. Les precedents et autres buts, caracteristiques et avantages de la presente invention deviendront plus In other words, the semiconductor detector is made up of a monolithic integrated circuit made up of a single chip comprising the sections described above, so that it internally adjusts the offset, setting the sensitivity and setting the temperature. A failure at the sensor therefore only involves replacing the sensor itself, but no replacement or additional adjustment of the external circuit, which simplifies maintenance of the sensor system. It is preferable that the semiconductor detector further includes an operation control section for externally receiving an operation control and subsequent setting data. Here, the operation control section writes the subsequent setting data to the rewritable non-volatile memory when the operation command is a write command. This facilitates the writing of the setting data in the rewritable non-volatile memory. It is also preferable that the operation command is a write prohibition command, the operation control section prohibits the writing of subsequent adjustment data in the rewritable non-volatile memory. This prevents noise or other abnormal events from rewriting erroneous tuning data in the rewritable non-volatile memory. The foregoing and other objects, features and advantages of the present invention will become more
apparents a partir de la description detaillee suivante en apparent from the following detailed description in
se referent aux dessins annexes. Dans les dessins: La figure 1 est une vue en coupe axiale d'un systeme de capteur de couple conformement a un premier mode de realisation de la presente invention; La figure 2 est une vue en perspective desassemblee du systeme de capteur de couple i La figure 3 est un schema synoptique sous forme de blocs d'un circuit integre du capteur magnetometrique du systeme de capteur de couple i La figure 4 est un schema synoptique sous forme de blocs d'une section de verrouillage du circuit integre du capteur magnetometrique i La figure 5 est un schema synoptique sous forme de blocs d'un circuit integre du capteur magnetometrique conformement a un deuxieme mode de realisation; La figure 6 est un schema synoptique sous forme de blocs d'un circuit integre du capteur magnetometrique conformement a un troi s ieme mode de real i sat ion i et La figure 7 est une vue en perspective desassemblee du systeme de capteur de couple conformement a un quatrieme refer to the accompanying drawings. In the drawings: Figure 1 is an axial sectional view of a torque sensor system in accordance with a first embodiment of the present invention; Figure 2 is a disassembled perspective view of the torque sensor system i Figure 3 is a block diagram of an integrated circuit of the magnetometric sensor of the torque sensor system i Figure 4 is a block diagram under block form of a locking section of the integrated circuit of the magnetometric sensor i FIG. 5 is a block diagram of an integrated circuit of the magnetometric sensor in accordance with a second embodiment; FIG. 6 is a block diagram of an integrated circuit of the magnetometric sensor in accordance with a third embodiment, and FIG. 7 is a disassembled perspective view of the torque sensor system in accordance with a fourth
mode de realisation.mode of realization.
(Premier mode de realisation) (Structure) Un systeme de capteur de couple en tent que premier mode de realisation de la presente invention, est utilise pour, par exemple un equipement de direction assistee electrique. En se referent a la figure 1, le systeme de capteur de couple est place entre un arbre d' entree 2 et un arbre de sortie 3, lesquels composent un arbre de direction, detecte le couple de braquage applique a l'arbre (First embodiment) (Structure) A torque sensor system as the first embodiment of the present invention is used for, for example, electric power steering equipment. Referring to Figure 1, the torque sensor system is placed between an input shaft 2 and an output shaft 3, which make up a steering shaft, detects the steering torque applied to the shaft
de direction.of management.
Les arbres d' entree et de sortie 2 et 3 sont, en rotation relative et transmettant le couple, associes par une barre de torsion 4. Un aimant annulaire 5 est fixe en l'assemblant avec le bord de l'arbre d' entree 2, alors qu'une couronne magnetique 6 est fixee au bord de l'arbre The input and output shafts 2 and 3 are, in relative rotation and transmitting the torque, associated by a torsion bar 4. An annular magnet 5 is fixed by assembling it with the edge of the input shaft 2 , while a magnetic crown 6 is fixed to the edge of the tree
de sortie 3.output 3.
La circonference de l'aimant annulaire 5 est magnetise par des poles alternes selon un pas predetermine sur la The circumference of the annular magnet 5 is magnetized by alternate poles according to a predetermined pitch on the
circonference. La couronne magnetique 6 comporte deux demi- circumference. The magnetic crown 6 has two half
couronnes magnetiques 6A et 6B attachees de maniere coaxiale a l'arbre de sortie 3 avec un espacement predetermine. Les deux demi-couronnes magnetiques 6A et 6B, constituees d'un element magnetique souple, vent grossierement en forme de L et de U. respectivement, dans une section axiale comme cela est represente sur la figure 1. Wiles comportent des dents qui entourent l'aimant annulaire 5, avec un espace predetermine par rapport a la circonference de l'aimant annulaire 5, et s'etendent dans la direction axiale avec un pas predetermine sur la circonference. Wiles comportent egalement des plaques circulaires qui stetendent dans la direction radiale vers l'exterieur par rapport aux bords inferieurs des dents, et des cavites cylindriques qui s'etendent dans la direction axiale par rapport aux bords des plaques circulaires. Les dents des demicouronnes magnetiques 6A et 6B vent placees alternativement sur la circonference. Le flux magnetique provenant du pole N de l'aimant annulaire 5 atteint le pole S de l'aimant annulaire 5 par l'intermediaire d'un circuit. Ce circuit traverse les dents d'une parmi les demicouronnes 6A et 6B contigue au pole N suivant la direction radiale vers l'exterieur, la cavite cylindrique d'une parmi les demi-couronnes 6A et 6B, la cavite cylindrique de l'autre parmi les demi-couronnes 6A et 6B et magnetic rings 6A and 6B attached coaxially to the output shaft 3 with a predetermined spacing. The two magnetic half-rings 6A and 6B, made up of a flexible magnetic element, roughly L-shaped and U-shaped, respectively, in an axial section as shown in Figure 1. Wiles have teeth which surround the annular magnet 5, with a predetermined space relative to the circumference of the annular magnet 5, and extend in the axial direction with a predetermined pitch on the circumference. Wiles also have circular plates which extend in the outward radial direction relative to the lower edges of the teeth, and cylindrical cavities which extend in the axial direction relative to the edges of the circular plates. The teeth of the magnetic half-crowns 6A and 6B are placed alternately on the circumference. The magnetic flux coming from the pole N of the annular magnet 5 reaches the pole S of the annular magnet 5 via a circuit. This circuit crosses the teeth of one of the half-crowns 6A and 6B contiguous to the pole N in the radial direction towards the outside, the cylindrical cavity of one of the half-crowns 6A and 6B, the cylindrical cavity of the other among half-crowns 6A and 6B and
la dent de l'autre parmi les demi-couronnes 6A et 6B. the tooth of the other among the half-crowns 6A and 6B.
Un circuit integre de capteur magnetometrique 7 est attache dans un etat stationnaire a l'interieur de l'espacement axial entre les demi-couronnes magnetiques 6A et 6B, pour detecter la variation de champ magnetique dans l'espacement. Des goupilles 8 servent a attacher la barre An integrated magnetometric sensor circuit 7 is attached in a stationary state within the axial spacing between the magnetic half-rings 6A and 6B, to detect the variation of magnetic field in the spacing. 8 pins are used to attach the bar
de torsion 4.torsion 4.
Dans la structure decrite ci-dessus, ['application du couple sur l'arbre d' entree 2 provoque une torsion de la barre de torsion 4, de telle sorte que le- couple est transmis a l'arbre de sortie 3. L' apparition d'une difference de position de rotation relative (ctest a dire, angle de rotation relative) entre l'aimant annulaire 5 et la couronne magnetique 6 fait varier la densite du flux magnetique entre les cavites cylindriques de la couronne magnetique 6. Cette variation de la densite du flux In the structure described above, the application of the torque to the input shaft 2 causes the torsion bar 4 to be twisted, so that the torque is transmitted to the output shaft 3. The appearance of a difference in relative rotation position (ie, relative angle of rotation) between the annular magnet 5 and the magnetic ring 6 varies the density of the magnetic flux between the cylindrical cavities of the magnetic ring 6. This variation flow density
magnetique est delivree en sortie vers ltexterieur. magnetic is delivered to the outside.
On expliquera ci-apres le circuit integre du capteur magnetometrique (capteur M) 7, en se referent a la figure 3. Le circuit integre du capteur magnetometrique 7, qui est integre dans une seule puce, inclut les elements suivants: trots bornes, a savoir une borne de source de tension 7A, une borne de masse (masse) 7B, et une borne de sortie 7C; un detecteur thermique 7E pour detecter la temperature au voisinage du circuit integre du capteur magnetometrique 7; un oscillateur 7F pour delivrer une horloge de reference a chaque section du circuit integre; un capteur magnetometrique 7G tel qu'un element a effet Hall pour detecter la densite du flux magnetique; une section de convertisseur analogique/numerique (A/N) 7H pour convertir la tension analogique de sortie du capteur magnetometrique 7G en une valeur numerique; une memoire non-vol at i le 7 N pour stocker le s donnee s de reg l age; une section de calcul 7I pour calculer le reglage des signaux numeriques delivres en sortie par la section du convertisseur A/N 7H en fonction des donnees stockees dans la memoire non-volatile 7N; une section de convertisseur numerique/analogique (N/A) 7J pour reconvertir, en tension analogique, les valeurs numeriques du resultat calcule dans la section de calcul 7I; une memoire tampon 7K pour delivrer en sortie vers l'exterieur la tension analogique reconvertie; une section logique 7L pour determiner l' operation de calcul de la section de calcul 7I en fonction de la tension d'alimentation appliquee a la borne de la source de tension 7A i et une section de verrouillage 7M pour desactiver la reecriture dans la memoire non-volatile 7N en fonction de la determination de The integrated circuit of the magnetometric sensor (sensor M) 7 will be explained below, with reference to FIG. 3. The integrated circuit of the magnetometric sensor 7, which is integrated in a single chip, includes the following elements: terminal trots, a knowing a voltage source terminal 7A, a ground (ground) terminal 7B, and an output terminal 7C; a thermal detector 7E for detecting the temperature in the vicinity of the integrated circuit of the magnetometric sensor 7; an oscillator 7F for delivering a reference clock to each section of the integrated circuit; a 7G magnetometric sensor such as a Hall effect element for detecting the density of the magnetic flux; an analog / digital (A / D) converter section 7H for converting the analog output voltage of the magnetometric sensor 7G to a digital value; a non-theft memory at i le 7 N to store the adjustment data; a calculation section 7I for calculating the adjustment of the digital signals output by the A / D converter section 7H as a function of the data stored in the non-volatile memory 7N; a section of digital / analog converter (D / A) 7J for reconverting, into analog voltage, the digital values of the result calculated in the calculation section 7I; a buffer memory 7K for delivering the reconverted analog voltage at the output; a logic section 7L to determine the calculation operation of the calculation section 7I as a function of the supply voltage applied to the terminal of the voltage source 7A i and a locking section 7M to deactivate the rewriting in the memory not -volatile 7N depending on the determination of
la section logique 7L.logical section 7L.
La section logique 7L detecte le niveau de tension applique a la borne de la source de tension 7A pour determiner si le niveau de tension correspond a l' operation de mesure habituelle ou a l' operation d'ecriture dans la memoire non-volatile 7N. Loreque lt operation d' ecriture est determinee, la section logique 7L numerise la variation de tension de la borne de la source de tension 7A pour obtenir des signaux numeriques. Les signaux numeriques vent ecrits dans la memoire non- volatile 7N via la section de verrouillage 7M. La section logique 7L comporte un comparateur destine a determiner le niveau de la tension d'alimentation. Loreque ltoperation de mesure habituelle est determinee, la section de verrouillage 7M commande l' interdiction d'ecrire dans la memoire non-volatile 7N, en The logic section 7L detects the voltage level applied to the terminal of the voltage source 7A to determine whether the voltage level corresponds to the usual measurement operation or to the write operation in the non-volatile memory 7N. When the write operation is determined, the logic section 7L digitizes the voltage variation of the terminal of the voltage source 7A to obtain digital signals. The digital signals are written to the non-volatile memory 7N via the locking section 7M. The logic section 7L includes a comparator intended to determine the level of the supply voltage. Once the usual measurement operation is determined, the locking section 7M controls the prohibition to write in the non-volatile memory 7N, in
fonction d'une commande provenant de la section logique 7L. function of a command from logic section 7L.
La section de calcul 7I, la section logique 7L et la section de verrouillage 7M vent formees par des circuits generalises bien connus. Wiles vent egalement realisees de maniere evidente a partir de circuits logiques materiels habituels ou de logiciels pour micro-ordinateurs, de sorte que l' explication detaillee des circuits ne sera pas The calculation section 7I, the logic section 7L and the locking section 7M are formed by well-known generalized circuits. Wiles are also evidently produced from usual hardware logic circuits or microcomputer software, so the detailed explanation of the circuits will not be
decrite ci-dessous.described below.
(Operation de detection habituelle) Une tension de fonctionnement habituelle (par exemple, V) est appliquee a la borne de source de tension 7A, de telle sorte que chaque circuit integre du capteur magnetometrique 7 est alimente par une puissance necessaire (Usual detection operation) Usual operating voltage (for example, V) is applied to the voltage source terminal 7A, so that each integrated circuit of the magnetometric sensor 7 is supplied with a necessary power
(tension electrique, courant electrique). (electric voltage, electric current).
L'oscillateur 7F fournit a chaque circuit des signaux The 7F oscillator provides each circuit with signals
dtimpulsion de cycle constant comme horloge de reference. constant cycle pulse as reference clock.
Une valeur de tension analogique relative aux informations sur la densite du flux magnetique delivree en sortie par le capteur magnetometrique 7G est convertie par la section du convertisseur A/N 7H en valeurs numeriques a transmettre a la section de calcul 7I. Une valeur de tension relative aux informations sur la temperature delivree en sortie par le detecteur thermique 7E est transmise au capteur magnetometrique 7G et a la section de calcul 7I. Un signal de mesure, indiquant qutune mesure habituelle doit etre effectuee maintenant, delivre en sortie par la section logique 7L est transmis a la section de calcul 7I. La section de calcul 7I, en fonction des informations et des parametres precedents stockes dans la memoire non volatile 7N, ajuste les informations sur la densite de flux magnetique detectee par le capteur magnetometrique 7G sur les informations numeriques pour les transmettre a la section du convertisseur N/A 7J. - Les informations numeriques vent converties par la section du convertisseur N/A 7J en tension analogique pour etre transmises vers An analog voltage value relating to the information on the density of the magnetic flux output at the output by the magnetometric sensor 7G is converted by the section of the A / D converter 7H into digital values to be transmitted to the calculation section 7I. A voltage value relating to the information on the temperature delivered at the output by the thermal detector 7E is transmitted to the magnetometric sensor 7G and to the calculation section 7I. A measurement signal, indicating that a usual measurement must be carried out now, delivered as an output by the logic section 7L is transmitted to the calculation section 7I. The computation section 7I, as a function of the preceding information and parameters stored in the non-volatile memory 7N, adjusts the information on the magnetic flux density detected by the magnetometric sensor 7G on the digital information to transmit it to the converter section N / A 7J. - The digital information is converted by the section of the D / A converter 7J into analog voltage to be transmitted to
l'exterieur via la memoire tampon 7K. the exterior via the 7K buffer memory.
(Operation sans detection) Une tension inhabituelle (par exemple, 6V et plus) autre que la tension de fonctionnement habituelle est appliquee a la borne de la source de tension 7A pendant plus longtemps qu'une periode predeterminee, de sorte que la section logique 7L detecte la tension inhabituelle pour determiner qu'un mode de programme est commande. La section logique 7L lit alors des modeles de variation de tension numerisees (par exemple, haut-8 V, teas-6 V) pour determiner une commande externe. La commande externe inclut une commande de reecriture, pour recrire les donnees stockees dans la memoire non-volatile 7N, une commande de lecture des donnees pour commander a la section de calcul 7I de delivrer en sortie vers l'exterieur les donnees stockees dans la memoire non-volatile 7N via la memoire tampon 7K, et une commande de verrouillage pour que les donnees restent stockees dans la memoire non- volatile 7N. Lorsque la section logique 7L determine la commande de verrouillage, elle commande a la section de verrouillage 7M (Operation without detection) An unusual voltage (for example, 6V and above) other than the usual operating voltage is applied to the terminal of the voltage source 7A for longer than a predetermined period, so that the logic section 7L detects unusual voltage to determine that a program mode is being commanded. The logic section 7L then reads digitized voltage variation models (for example, haut-8 V, teas-6 V) to determine an external command. The external command includes a rewrite command, to recreate the data stored in the non-volatile memory 7N, a command to read the data to order the computation section 7I to output the data stored in the memory to the outside. non-volatile 7N via the buffer memory 7K, and a locking command so that the data remains stored in the non-volatile memory 7N. When the logic section 7L determines the locking command, it commands the locking section 7M
d' interdire d' ecrire dans la memoire non-volatile 7N. to prohibit writing to non-volatile memory 7N.
L' installation de la section de verrouillage 7M empeche une recriture erronee dans la memoire non-volatile 7N meme loraque la variation de tension due a une perturbation externe est incorrectement determinee comme etant une The installation of the locking section 7M prevents an erroneous rewriting in the non-volatile memory 7N even when the voltage variation due to an external disturbance is incorrectly determined as being a
commande de reecriture.rewrite command.
En se referent a la figure 4, la section de verrouillage 7M est formee de maniere caractere entre une borne R/W de la section logique 7L et une borne R/W de la memoire non-volatile 7N. La section de verrouillage 7M inclut une porte de transfert ou un transistor MOS 71 formant un circuit inverseur et un circuit pour commander par intermittence le transistor MOS 71 en fonction d'un Referring to Figure 4, the locking section 7M is formed characteristically between an R / W terminal of the logic section 7L and an R / W terminal of the non-volatile memory 7N. The locking section 7M includes a transfer gate or a MOS transistor 71 forming an inverter circuit and a circuit for intermittently controlling the MOS transistor 71 according to a
etat de potentiel delivre en entre par une memoire non- state of potential delivered by entering by a non-memory
volatile dans laquelle il est possible d'ecrire une seule fois (PROM), une ROM a fusible par exemple. Quand la section logique 7L desactive irreversiblement la PROM, la porte de transfert est desactivee pour interdire a la section logique 7L d'ecrire dans la memoire non volatile 7N. A ['oppose, ltecriture sera de nouveau possible par d'autres procedes tels que ['effacement aux volatile in which it is possible to write only once (PROM), a ROM with fuse for example. When the logical section 7L irreversibly deactivates the PROM, the transfer gate is deactivated to prohibit the logical section 7L from writing to the non-volatile memory 7N. In contrast, writing will again be possible by other methods such as erasing
ultraviolets differents du procede de signal de tension. Different ultraviolet from the voltage signal process.
(Effet) Un systeme de capteur de couple traditionnel est (Effect) A traditional torque sensor system is
commande par un signal de detection d'un capteur de couple. control by a detection signal of a torque sensor.
Le systeme de capteur de couple traditionnel est compose du capteur de couple, d'une unite du capteur de couple comme partie mecanique et d'une unite de commande electronique (ECU) qui calcule, avec le signal de sortie provenant de l' unite du capteur de couple, un signal de commande a delivrer en sortie. Le reglage d'une caracteristique du capteur de couple est effectue dans l'ECU en reglant, avant l' expedition du systeme, un circuit de reglage attache a l'ECU ou en stockant les informations de reglage dans une memoire non-volatile de l'ECU. Une panne de l' unite du capteur de couple decrite ci-dessus implique que la totalite du systeme de capteur de couple soit remplacee sur le site ou que l'ECU soit reglee apres un remplacement partiel. Une panne de l'ECU implique egalement la mise en muvre de procedures similaires a celles d'une panne de l' unite du capteur de couple. La quantite de travail de recuperation necessaire a la suite d'une panne, comme cela The traditional torque sensor system consists of the torque sensor, a torque sensor unit as a mechanical part and an electronic control unit (ECU) which calculates, with the output signal from the unit. torque sensor, a control signal to be output. The adjustment of a characteristic of the torque sensor is carried out in the ECU by adjusting, before the shipment of the system, an adjustment circuit attached to the ECU or by storing the adjustment information in a non-volatile memory of the ECU. A failure of the torque sensor unit described above implies that the entire torque sensor system is replaced on site or that the ECU is adjusted after partial replacement. A failure of the ECU also involves the implementation of procedures similar to that of a failure of the torque sensor unit. The amount of recovery work required following a breakdown, like this
est decrit ci-dessus, est done importante. is described above, is therefore important.
Dans le mode de realisation, le capteur magnetometrique, constituent le capteur de couple, comporte une memoire non-volatile integree et differents circuits de traitement, de telle sorte que le reglage du decalage, le reglage de la sensibilite et le reglage de la caracteristique de temperature soient effectues dans le capteur de couple. Loreque le capteur de couple est hors service, le travail de recuperation implique seulement le remplacement du capteur de couple hors- service sans reglage au niveau de l' ECU. Ceci permet de diminuer sensiblement le temps et le cout du travail de recuperation. Lorsque l'ECU est hors-service, seule l' ECU doit etre remplacee sans necessiter aucun reglage supplementaire dans l'ECU remplacee. La diminution du nombre de composants dans le capteur de couple augmente la fiabilite. Les informations sur le reglage peuvent etre modifiees et stockees conformement aux autres caracteristiques du systeme, de sorte que la flexibilite pour differentes utilisations est augmentee. (Deuxieme mode de realisation) En se referent a la. figure 5, dans un deuxieme mode de realisation, une section de sortie en serie 70 est adoptee pour delivrer en sortie des signaux numeriques pour remplacer la section du convertisseur N/A 7J et de la In the embodiment, the magnetometric sensor, constitute the torque sensor, has an integrated non-volatile memory and different processing circuits, so that the adjustment of the offset, the adjustment of the sensitivity and the adjustment of the characteristic of temperature are carried out in the torque sensor. When the torque sensor is out of service, the recovery work only involves replacing the torque sensor out of service without adjustment at the ECU level. This significantly reduces the time and cost of the recovery work. When the ECU is out of service, only the ECU needs to be replaced without requiring any additional settings in the replaced ECU. Reducing the number of components in the torque transducer increases reliability. The setting information can be changed and stored in accordance with other features of the system, so that flexibility for different uses is increased. (Second embodiment) In refer to the. FIG. 5, in a second embodiment, a series output section 70 is adopted to deliver digital signals at output to replace the section of the D / A converter 7J and the
memoire tampon 7K representees sur la figure 3. buffer memory 7K shown in FIG. 3.
Dans ce mode de realisation, l' adoption de la sortie en serie peut empecher plusieurs problemes lies a la sortie de la tension analogique tels qu'une erreur due a la chute de tension liee a la resistance des fils ou un effet negatif provoque par le bruit electromagnetique. De plus, dans une ECU qui recoit le signal numerique delivre en sortie par la section de sortie en serie 70, les effete negatifs provoques par le bruit des hautes frequences diminuent grace a un filtre passe-bas sans que la precision des .... In this embodiment, the adoption of the serial output can prevent several problems related to the analog voltage output such as an error due to the voltage drop related to the resistance of the wires or a negative effect caused by the electromagnetic noise. In addition, in an ECU which receives the digital signal output by the output section in series 70, the negative effects caused by high frequency noise decrease thanks to a low-pass filter without the precision of ....
slgnaux numerlques ne dlmlnue.numeric signs not dlmlnue.
(Troisieme mode de realisation) En se referent a la figure 6, dans un troisieme mode de realisation, un circuit de calcul analogique 7P est adopte pour remplacer la section de calcul 7I representee sur la figure 3. Le circuit de calcul analogique 7P est constitue de differents circuits de calcul utilisant des amplificateurs operationnels pour effectuer le calcul commande par la section logique 7L. En se basant sur le remplacement, un signal de sortie est convert), par une section de convertisseur N/A 7J, en tension analogique pour (Third embodiment) Referring to FIG. 6, in a third embodiment, an analog computing circuit 7P is adopted to replace the computing section 7I represented in FIG. 3. The analog computing circuit 7P is constituted different calculation circuits using operational amplifiers to carry out the calculation controlled by logic section 7L. Based on the replacement, an output signal is converted), by a D / A converter section 7J, to analog voltage for
etre delivre en sortie au circuit de calcul analogique 7P. be delivered as an output to the analog calculation circuit 7P.
Dans ce mode de realisation, ['adoption du circuit de calcul analogique 7P mene a la suppression de la section du convertisseur A/N 7H representee sur la figure 3, de telle sorte que des circuits simples et un calcul rapide soient obtenus. (Quatrieme mode de realisation) En se referent a la figure 7, dans un quatrieme mode de realisation, une padre d'anneaux collecteurs de magnetisme 9A et 9B est ajoutee. La padre d'anneaux collecteurs de magnetisme 9A et 9B, constitues d'un element magnetique tendre, fait converger, en un point, le flux magnetique genere par un aimant annulaire 5 et qui passe entre une padre de demi-couronnes magnetiques 6A et 6B. Les anneaux collecteurs de magnetisme 9A et 9B vent fixes dans un etat stationnaire avec un espace etroit predetermine par rapport aux bords de la circonference des plaques circulaires des demicouronnes magnetiques 6A et 6B, respectivement. Les anneaux collecteurs de magnetisme 9A et 9B ont des plaques collectrices du magnetisme 9C et 9D respectivement. Les plaques collectrices du magnetisme 9C et 9D, constituees d'un element magnetique tendre, s'etendent dans la direction radiale vers l'exterieur a des points predetermines et vent les unes en face des autres avec un espacement axial predetermine. L'espacement axial predetermine entre les plaques 9C et 9D est beaucoup plus etroit que celui entre les anneaux 9A et 9B. L'espacement axial entre les anneaux 9A et 9B est defini pour etre assez large, alors que les demi-couronnes magnetiques 6A et 6B ne comportent pas de cavite cylindrique comme cela est In this embodiment, the adoption of the analog computation circuit 7P leads to the elimination of the section of the A / D converter 7H represented in FIG. 3, so that simple circuits and rapid computation are obtained. (Fourth embodiment) Referring to FIG. 7, in a fourth embodiment, a pad of magnetism collecting rings 9A and 9B is added. The padre of magnetism collecting rings 9A and 9B, constituted by a soft magnetic element, makes converge, at a point, the magnetic flux generated by an annular magnet 5 and which passes between a padre of magnetic half-crowns 6A and 6B . The magnetism collector rings 9A and 9B are fixed in a stationary state with a predetermined narrow space relative to the edges of the circumference of the circular plates of the magnetic half-cores 6A and 6B, respectively. The magnetism collector rings 9A and 9B have magnetism collector plates 9C and 9D respectively. The magnetism collecting plates 9C and 9D, consisting of a soft magnetic element, extend in the radial direction towards the outside at predetermined points and wind opposite one another with a predetermined axial spacing. The predetermined axial spacing between the plates 9C and 9D is much narrower than that between the rings 9A and 9B. The axial spacing between the rings 9A and 9B is defined to be wide enough, while the magnetic half-rings 6A and 6B do not have a cylindrical cavity as is
represente sur les figures 1 et 2.shown in Figures 1 and 2.
Dans la structure decrite ci-dessus, le flux magnetique entre dans un de s anneaux col lecteurs de magnet i sme 9A et 9B depuis une plaque contigue parmi les plaques annulaires des couronnes 6A et 6B. Il passe ensuite dans l'autre parmi les anneaux collecteurs de magnetisme 9A et 9B a travers les plaques mutuelles 9C et 9D. Puis il passe dans l'autre parmi les plaques circulaires des couronnes 6A et 6B. Presque tout le flux magnetique converge done entre les plaques 9C et 9D, en traversant un circuit integre du capteur magnetometrique 7 qui est place entre les plaques 9C et 9D. Cette structure augmente la sensibilite du capteur de couple et reduit les erreurs de deplacement axial, par rapport a la structure du premier mode de In the structure described above, the magnetic flux enters one of the magnet reader necks i sme 9A and 9B from a contiguous plate among the annular plates of the crowns 6A and 6B. It then passes into the other among the magnetism collecting rings 9A and 9B through the mutual plates 9C and 9D. Then it passes into the other among the circular plates of the crowns 6A and 6B. Almost all of the magnetic flux therefore converges between the plates 9C and 9D, passing through an integrated circuit of the magnetometric sensor 7 which is placed between the plates 9C and 9D. This structure increases the sensitivity of the torque sensor and reduces the errors of axial displacement, compared to the structure of the first mode of
realisation represente sur les figures 1 et 2. realization represented in FIGS. 1 and 2.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0607970A FR2889306B1 (en) | 2002-02-15 | 2006-09-12 | SEMICONDUCTOR SENSOR WITH INTEGRATED ADJUSTING CIRCUIT AND TORSION BAR TYPE TORQUE SENSOR SYSTEM. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002038879A JP2003240652A (en) | 2002-02-15 | 2002-02-15 | Output corrective circuit built-in semiconductor sensor and torsion bar type torque sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2837281A1 true FR2837281A1 (en) | 2003-09-19 |
| FR2837281B1 FR2837281B1 (en) | 2008-03-14 |
Family
ID=27655120
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0301728A Expired - Fee Related FR2837281B1 (en) | 2002-02-15 | 2003-02-13 | SEMICONDUCTOR SENSOR WITH INTEGRATED ADJUSTING CIRCUIT AND TORSION BAR TYPE TORQUE SENSOR SYSTEM |
| FR0607970A Expired - Fee Related FR2889306B1 (en) | 2002-02-15 | 2006-09-12 | SEMICONDUCTOR SENSOR WITH INTEGRATED ADJUSTING CIRCUIT AND TORSION BAR TYPE TORQUE SENSOR SYSTEM. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0607970A Expired - Fee Related FR2889306B1 (en) | 2002-02-15 | 2006-09-12 | SEMICONDUCTOR SENSOR WITH INTEGRATED ADJUSTING CIRCUIT AND TORSION BAR TYPE TORQUE SENSOR SYSTEM. |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US6847902B2 (en) |
| JP (1) | JP2003240652A (en) |
| DE (1) | DE10306306B4 (en) |
| FR (2) | FR2837281B1 (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003240652A (en) * | 2002-02-15 | 2003-08-27 | Denso Corp | Output corrective circuit built-in semiconductor sensor and torsion bar type torque sensor |
| JP3913657B2 (en) * | 2002-10-02 | 2007-05-09 | 株式会社日本自動車部品総合研究所 | Torque sensor |
| JP4474872B2 (en) * | 2003-09-02 | 2010-06-09 | パナソニック株式会社 | Absolute rotation angle and torque detector |
| JP4656851B2 (en) * | 2004-03-18 | 2011-03-23 | 株式会社ジェイテクト | Torque detection device |
| JP2005326368A (en) * | 2004-05-17 | 2005-11-24 | Favess Co Ltd | Torque detection device |
| US7412906B2 (en) * | 2005-06-30 | 2008-08-19 | Globe Motors, Inc. | Steering system torque sensor |
| JP2007187527A (en) * | 2006-01-12 | 2007-07-26 | Jtekt Corp | Torque detector |
| US20080030188A1 (en) * | 2006-08-07 | 2008-02-07 | Richard Louis Ponziani | Non-contact position sensor |
| DE102007028481A1 (en) * | 2007-06-21 | 2008-12-24 | Robert Bosch Gmbh | sensor arrangement |
| DE102007044471A1 (en) * | 2007-09-18 | 2009-04-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for sectionally determining a parameter-dependent correction value approximation course and sensor arrangement |
| DE102008028826A1 (en) * | 2008-06-19 | 2009-12-24 | GIF Gesellschaft für Industrieforschung mbH | Torque measuring unit has torque measuring flange and evaluation device, where evaluation device has unit for storing variable which is proportional to freewheel torque |
| EP2212670A1 (en) * | 2007-11-13 | 2010-08-04 | GIF Gesellschaft für Industrieforschung mbH | Torque measuring device, torque measuring flange and torque measuring method |
| JP2010002382A (en) * | 2008-06-23 | 2010-01-07 | Kayaba Ind Co Ltd | Output control method for torque sensor |
| JP5052542B2 (en) * | 2009-02-13 | 2012-10-17 | カヤバ工業株式会社 | Torque sensor output adjustment method |
| JP2011013133A (en) * | 2009-07-03 | 2011-01-20 | Kyb Co Ltd | Torque sensor |
| JP5563549B2 (en) * | 2011-12-16 | 2014-07-30 | 株式会社デンソー | Torque sensor |
| JP2014240234A (en) | 2013-06-11 | 2014-12-25 | 株式会社日本自動車部品総合研究所 | Steering control device |
| JP2016041542A (en) * | 2014-08-18 | 2016-03-31 | 株式会社ジェイテクト | Steering apparatus |
| JP6217608B2 (en) * | 2014-11-27 | 2017-10-25 | 株式会社デンソー | Magnetic detection device and torque sensor using the same |
| JP6217609B2 (en) * | 2014-11-27 | 2017-10-25 | 株式会社デンソー | Magnetic detection device and torque sensor using the same |
| US10267693B2 (en) | 2016-08-26 | 2019-04-23 | General Electric Company | System and method for measuring torque on a rotating component |
| JP7005341B2 (en) * | 2017-12-27 | 2022-01-21 | 株式会社Soken | Torque detector |
| JP2021144553A (en) * | 2020-03-13 | 2021-09-24 | 日立Astemo株式会社 | Sensor device |
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Also Published As
| Publication number | Publication date |
|---|---|
| US6847902B2 (en) | 2005-01-25 |
| DE10306306B4 (en) | 2013-02-28 |
| US7110902B2 (en) | 2006-09-19 |
| FR2837281B1 (en) | 2008-03-14 |
| JP2003240652A (en) | 2003-08-27 |
| FR2889306B1 (en) | 2014-06-06 |
| US20050109126A1 (en) | 2005-05-26 |
| FR2889306A1 (en) | 2007-02-02 |
| US20030155627A1 (en) | 2003-08-21 |
| DE10306306A1 (en) | 2003-08-28 |
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